I have visited 53/63 national parks in the United States. The ten I haven’t visited are: Dry Tortugas, American Samoa, U.S. Virgin Islands, Haleakela, Hawaii Volcanoes, Glacier Bay, Katmai, Lake Clark, Gates of the Artic and Kobuk Valley. All of these parks would require flying or a long boat ride, so I do not think I will complete this list anytime soon.

I have put my favorite picture from each national park, along with the date I first visited below. *Parks I have visited multiple times are marked with an asterisk.
#53 Isle Royale National Park, May 2022

#52 Voyageurs National Park, May 2022

#51 Shenandoah National Park, May 2022

#50 Everglades National Park, May 2022

#49 Biscayne National Park, May 2022

#48 New River Gorge National Park, May 2022

#47 White Sands National Park, September 2021

#46 Carlsbad Caverns National Park, September 2021

#45 Guadalupe Mountains National Park, September 2021

#44 Big Bend National Park, September 2021

#43 Congaree National Park, September 2021

#42 Great Smoky Mountains National Park, September 2021

#41 Hot Springs National Park, September 2021

#40 Rocky Mountain National Park, May 2021

#39 Black Canyon of the Gunnison National Park, May 2021

#38 Saguaro National Park, March 2020*

#37 Gateway Arch National Park, August 2019

#36 Mammoth Caves National Park, August 2019

#35 Indiana Dunes National Park, May 2019

#34 Channel Islands National Park, February 2019

#33 North Cascades National Park, August 2018*

#32 Mt. Rainier National Park, August 2018

#31 Great Sand Dunes National Park, December 2017*

#30 Mesa Verde National Park, December 2017

#29 Petrified Forest National Park, December 2017

#28 Glacier National Park, July 2017

#27 Crater Lake National Park, July 2017*

#26 Denali National Park, May 2017

#25 Kenai Fjords National Park, May 2017

#24 Wrangell St. Elias National Park, May 2017

#23 Olympic National Park, May 2017

#22 Redwood National Park, May 2017

#21 Joshua National Park, December 2016

#20 Lassen Volcanic National Park, July 2016

#19 Great Basin National Park, August 2014

#18 Zion National Park, August 2014*

#17 Bryce Canyon National Park, August 2014

#16 Capitol Reef National Park, August 2014

#15 Canyonlands National Park, August 2014

#14 Arches National Park, August 2014*

#13 Grand Teton National Park, August 2014*

#12 Yellowstone National Park, August 2014

#11 Theodore Roosevelt National Park, August 2014

#10 Wind Cave National Park, August 2014

#9 Badlands National Park, August 2014

#8 Cuyahoga Valley National Park, August 2014

#7 Sequoia National Park, August 2014*

#6 Kings Canyon National Park, August 2014*

#5 Acadia National Park, June 2014

#4 Grand Canyon National Park, January 2014*

#3 Death Valley National Park, January 2014*

#2 Yosemite National Park, April 2011*

#1 Pinnacles National Park, March 2010
no pictures 😦